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Re: Plot Axis Unit Conversions

  • To: mathgroup at
  • Subject: [mg98892] Re: [mg98820] Plot Axis Unit Conversions
  • From: "David Park" <djmpark at>
  • Date: Mon, 20 Apr 2009 19:15:26 -0400 (EDT)
  • References: <7641571.1240207427692.JavaMail.root@n11>

You could write you own Ticks option to specify the tick marks at the top of
a Frame plot. The Mathematica function Rescale might be useful in this
regard. Look up Ticks and FrameTicks in Help.

The Presentations package ($50) at my web site does include a CustomTicks
function that allows one to generate new scales that have any 1-1 mapping
between the tick values and the underlying coordinates. It also does both
the labeled and unlabeled ticks. There is an example on the following page
at my web site. 

David Park
djmpark at  

From: unknownowen at [mailto:unknownowen at] 

Hello everyone,

I am working on a notebook involving a flutter analysis of a flat
plate in a wind tunnel. All of the equations involve metric units, but
most of the physical measurements of size I have are in inches. In
order to maintain a consistent system of units, I would like to plot
the axis units in metric and English units. Specifically, I have a
plot for the critical flutter speed in units of m/s versus the chord
length in meters, and I want to overlay an x-axis, possibly on the
top, that will display the equivalent length in inches (i.e,
xinches=x*10000/254) without messing up the graph. At the very least,
I would like to display it in centimeters instead of meters for better
clarity. I do NOT want to recalculate the function using inches - just
display the conversion. It would be nice if I could display it in both
inches and centimeters at the same time.

This is an absolute breeze to do in another system, but I haven't been
able to find anything specifically dealing with scaling of axes for
Mathematica. Anyone have any ideas?

Thanks very kindly!

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